1305032217 has 16 divisors (see below), whose sum is σ = 1892195712. Its totient is φ = 796711680.

The previous prime is 1305032191. The next prime is 1305032237. The reversal of 1305032217 is 7122305031.

It is not a de Polignac number, because 1305032217 - 2⁶ = 1305032153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1305032237) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 343909 + ... + 347682.

It is an arithmetic number, because the mean of its divisors is an integer number (118262232).

Almost surely, 2^1305032217 is an apocalyptic number.

1305032217 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

1305032217 is a deficient number, since it is larger than the sum of its proper divisors (587163495).

1305032217 is a wasteful number, since it uses less digits than its factorization.

1305032217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 691648.

The product of its (nonzero) digits is 1260, while the sum is 24.

The square root of 1305032217 is about 36125.2296463289. The cubic root of 1305032217 is about 1092.7993072827.

Adding to 1305032217 its reverse (7122305031), we get a palindrome (8427337248).

The spelling of 1305032217 in words is "one billion, three hundred five million, thirty-two thousand, two hundred seventeen".